杨恒书, 赖旭龙, 杨逢清, 殷鸿福. 1995: 四川隆康、塔藏含火山岩地层时代新证据. 地质通报, (1).
    引用本文: 杨恒书, 赖旭龙, 杨逢清, 殷鸿福. 1995: 四川隆康、塔藏含火山岩地层时代新证据. 地质通报, (1).
    1995: NEW EVIDENCE FOR THE AGE OF THE VOLCANICS-BEARING STRATA IN LONGKANG AND TAZANG,SICHUAN. Geological Bulletin of China, (1).
    Citation: 1995: NEW EVIDENCE FOR THE AGE OF THE VOLCANICS-BEARING STRATA IN LONGKANG AND TAZANG,SICHUAN. Geological Bulletin of China, (1).

    四川隆康、塔藏含火山岩地层时代新证据

    NEW EVIDENCE FOR THE AGE OF THE VOLCANICS-BEARING STRATA IN LONGKANG AND TAZANG,SICHUAN

    • 摘要: 在四川南坪县隆康和塔藏一带主要发育一些碳酸盐岩、砂岩、页岩及海相火山岩。1:20万漳腊幅区调报告2将含火山岩地层的时代划归于早二叠世和中三叠世。通过在该区系统测制剖面,在原视为中-晚三叠世的含基性火山岩的地层中作者获得了以Palmatolepisgracilissigmoidalis,P.marginijera为代表的一些晚泥盆世法门期牙形石,因为该区海相火山岩与含晚泥盆世牙形石的碳酸盐岩呈互层关系,海相火山岩的时代应改属晚泥盆世。

       

      Abstract: There are mainly deveolped carbonate rocks,sandstone,shale and marine volcanic rocksin the Longkang and Tazang area,Nanping County,Sichuan Province. In the report on re-gional surveys of the 1:200000 Zhangal Sheet,the age of the strata bearing volcanic rocks isassigned to Early Permian and Middle Triassic. Through a systematic measurement of sec-tions in the area,the authors obtained some Famznenian(Late Devonian)conodonts repre-sented by Palmatolepis gracilis sigmoidalis and P. marginifera in the vasic volcancs-bearingsrata that were originally considered to be Middle-Late Triassic in age. As the marine vol-canic rocks alternate with carbonate rocks yielding Late Devonian conodonts iii the area,theage of marine volcanic rocks should be Late Devonian.

       

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